Rollup merge of #105399 - mikebenfield:lfs, r=thomcc

Use more LFS functions.

On Linux, use mmap64, open64, openat64, and sendfile64 in place of their non-LFS counterparts.

This is relevant to #94173.

With these changes (together with rust-lang/backtrace-rs#501), the simple binaries I produce with rustc seem to have no non-LFS functions, so maybe #94173 is fixed. But I can't be sure if I've missed something and maybe some non-LFS functions could sneak in somehow.

1 files changed, 5 insertions, 2 deletions

diff --git a/library/std/src/sys/unix/stack_overflow.rs b/library/std/src/sys/unix/stack_overflow.rs
index 75a5c0f9279..957e086798f 100644
--- a/library/std/src/sys/unix/stack_overflow.rs
+++ b/library/std/src/sys/unix/stack_overflow.rs
@@ -45,7 +45,10 @@ mod imp {
     use crate::thread;
 
     use libc::MAP_FAILED;
-    use libc::{mmap, munmap};
+    #[cfg(not(target_os = "linux"))]
+    use libc::{mmap as mmap64, munmap};
+    #[cfg(target_os = "linux")]
+    use libc::{mmap64, munmap};
     use libc::{sigaction, sighandler_t, SA_ONSTACK, SA_SIGINFO, SIGBUS, SIG_DFL};
     use libc::{sigaltstack, SIGSTKSZ, SS_DISABLE};
     use libc::{MAP_ANON, MAP_PRIVATE, PROT_NONE, PROT_READ, PROT_WRITE, SIGSEGV};
@@ -135,7 +138,7 @@ mod imp {
         #[cfg(not(any(target_os = "openbsd", target_os = "netbsd", target_os = "linux",)))]
         let flags = MAP_PRIVATE | MAP_ANON;
         let stackp =
-            mmap(ptr::null_mut(), SIGSTKSZ + page_size(), PROT_READ | PROT_WRITE, flags, -1, 0);
+            mmap64(ptr::null_mut(), SIGSTKSZ + page_size(), PROT_READ | PROT_WRITE, flags, -1, 0);
         if stackp == MAP_FAILED {
             panic!("failed to allocate an alternative stack: {}", io::Error::last_os_error());
         }